Using hooks inside class components
React Hooks were designed specifically for function components and cannot be used directly inside class components. This is a fundamental constraint of React’s architecture. Here’s what you need to know:….
Tag: Class components
Listening to window events without cleaning them up
A particularly insidious type of memory leak occurs when you add event listeners to the window object but fail to remove them when your React component unmounts. Here’s what you….
Forgetting to remove event listeners on unmount
A common memory leak issue in React occurs when event listeners aren’t properly removed when components unmount. Here’s how to handle this correctly: The Problem When you add event listeners….
Passing a function as a prop but forgetting to bind it in class components
Passing a function as a prop without binding it in class components in React can lead to issues where the this keyword doesn’t refer to the correct context, causing errors….
Accessing state before super(props) in a class component
Understanding super(props) and State Initialization in Class Components A common React anti-pattern is trying to access this.state before calling super(props) in a class component constructor. Here’s what you need to….
Forgetting to use React Fragments (<>…)
The Importance of React Fragments and How to Use Them Properly A common mistake in React development is forgetting to use Fragments when returning multiple elements, which leads to unnecessary….
Forgetting to remove timers (setInterval) on unmount
Forgetting to clear timers (like setInterval) when a component unmounts is a common source of memory leaks in React applications. Here’s how to properly handle timers to avoid these issues:….
Using hooks inside class components
A fundamental limitation of React is that hooks cannot be used inside class components. This is a deliberate design choice by the React team, as hooks were created specifically for….
Forgetting to remove event listeners on unmount
Forgetting to Remove Event Listeners on Unmount in React A common memory leak issue in React occurs when event listeners aren’t properly cleaned up when components unmount. This can lead….
Passing this incorrectly in event handlers (onClick={this.handleClick} vs onClick={this.handleClick.bind(this)})
Properly Passing this in React Event Handlers A common source of confusion in React class components is correctly binding event handlers to maintain proper this context. Here’s a clear breakdown….